<!DOCTYPE html>
<html>
<head>
    <title>控制小车</title>
    <style>
        .start-button {
            background-color: green;
        }
        .stop-button {
            background-color: red;
        }
    </style>
</head>
<body>
<button class="start-button" onclick="window.location.href='/action?isGo=true'">开始</button>
<button class="stop-button" onclick="window.location.href='/action?isGo=false'">停止</button>
</body>
</html>